Just spend a few days in the Yakima and Tri-Cities area.
Yes, Yakamia is now using P25 Ditigal as a primary and the mobile radios also have the ability to go to narrow band analog as a back up until the switch over is complete.
After the system in Yakamia is completly done, then Tri-Cities will convert then move to Ellensburg/Wenatachie, then Spokane, then Vancouver, then Marysville, then Seattle, then Tacoma/Olympia.
The installion of the dispatch consoles is been done in the above order and at the same time the current dispatch ability will remain in place.
All of the current frequency's that the patrol uses will remain, just changing them to P-25 digatal
There is also no plans to do any primary dispatching on the 700/800 trunk systems, this is for interop in the areas that use trunking as their primary dispatch.